When you like somebody, you share your feelings without knowing whether or not they feel the same way about you. Here to help change this and provide a ‘guarantee’ is a web app called Crush Notifier.

Crush Notifier is a Facebook application that lets you select up to 2 crushes from your Facebook contacts. You can select more crushes if you ‘buy’ them through Facebook credit. When one of your crushes uses the application and picks you as their crush, both of you are sent a notification email. The rest, of course, is in your hands.